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Product Name: Isoniazid
Generic Name: Isoniazid
Common Brands: Nydrazid
Pharmaceutical Categories: Antibiotics, Anti-Infectives, Antiparasitic

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  • Isoniazid tablets 300 mg
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  • Isoniazid tablets 300 mg
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  • Isoniazid (trade names include Nydrazid, Cemidon, Hydra, INH-Ciba, Isokin, Isonex, Isozid, Laniazid, Solonex, Tibinide) is an anti tuberculosis drug from hydrazides pharmacological group. This medication is used for the treatment and prevention of tuberculosis (TB) in people with isoniazid-sensitive Mycobacterium tuberculosis infection, including latent tuberculosis infection (LTBI). For active tuberculosis it is often indicated together with rifampicin (rifampin), pyrazinamide, streptomycin, ethambutol, or other anti-TB agents. This medicine is also prescribed for the therapy of atypical types of mycobacteria, such as Mycobacterium avium, M. kansasii, and M. xenopi. Isoniazid may be used in veterinary medicine for dogs. It works by killing these kinds of mycobacterium.


    Isoniazid tablets, USP


    Related medications:

  • 4-Aminosalicylic Acid (Paser)
  • Bedaquiline (Sirturo)
  • Capreomycin (Capastat)
  • Cycloserine (Seromycin)
  • Delamanid (Deltyba)
  • Ethambutol (Myambutol)
  • Ethambutol, Isoniazid (Combunex)
  • Ethambutol, Isoniazid, Pyrazinamide, Rifampicin (Rimstar)
  • Ethambutol, Isoniazid, Rifampicin (Akt 3)
  • Ethionamide (Trecator)
  • Ftivazide (Ftivazid)
  • Isoniazid, Pyrazinamide, Rifampicin (Rifater)
  • Isoniazid, Rifampicin (R-Cinex)
  • Moxifloxacin (Avelox)
  • Protionamide (Peteha)
  • Pyrazinamide (Pyzina)
  • Rifabutin (Mycobutin)
  • Rifampicin (Rifampin)
  • Rifamycin (Aemcolo)
  • Rifapentine (Priftin)
  • Terizidone (Terizidon)
  • Thioacetazone (Conteben)


    Pharmaceutical and medical classifications:

  • Anti tuberculosis drugs
  • Anti-TB agents
  • Antibacterials
  • Antibiotics
  • Antitubercular medicines
  • Prodrugs
  • Tuberculosis management
  • Veterinary, pet meds


    The Anatomical Therapeutic Chemical (ATC) classification system (developed by the World Health Organization):

  • J - Antiinfectives for systemic use
  • J04 - Antimycobacterials
  • J04A - Drugs for treatment of tuberculosis
  • J04AC - Hydrazides
  • J04AC01 - Isoniazid


    Medical conditions for isoniazid in the International Statistical Classification of Diseases and Related Health Problems (ICD):

  • Tuberculosis - A15-A19
  • Respiratory tuberculosis, bacteriologically and histologically confirmed - A15
  • Respiratory tuberculosis, not confirmed bacteriologically or histologically - A16
  • Tuberculosis of nervous system - A17
  • Tuberculosis of other organs - A18
  • Miliary tuberculosis - A19


    Pregnancy category:

  • A - Australia
  • C - United States (Risk cannot be ruled out)


    Forms of active pharmaceutical ingredients (APIs):

  • Isoniazid Base
  • Isoniazid Acid Hydrazid
  • Isoniazid Aminosalicylate
  • Isoniazid Sodium Glucuronate
  • Isoniazid Sodium Methanesulfonate Hydrate


    Chemical, international, and other names of this drug:

  • 4-(Hydrazinocarbonyl)pyridine
  • 4-Pyridinecarbonylhydrazine
  • 4-Pyridinecarboxylic Acid Hydrazide
  • 4-Pyridinecarboxylic Hydrazide
  • 4-Pyridylcarbonylhydrazide
  • Human Beta-Defensin-1
  • Hydrazide de l'Acide Isonicotinique
  • Idrazide Dell'acido Isonicotinico
  • INH
  • Isohydrazide
  • Isoniacid
  • Isoniacida
  • Isoniasied
  • Isoniatsidi
  • Isoniazida
  • Isoniazide
  • Isoniazidum
  • Isonicotinezuurhydrazide
  • Isonicotinhydrazid
  • Isonicotinic Acid Hydrazide
  • Isonicotinic Hydrazide
  • Isonicotinohydrazide
  • Isonicotinoyl Hydrazide
  • Isonicotinoylhydrazide
  • Isonicotinoylhydrazine
  • Isonicotinsaeurehydrazid
  • Isonicotinyl Hydrazide
  • Isonicotinyl Hydrazine
  • Isonicotinylhydrazide
  • Isonicotinylhydrazine
  • Isonikotinylhydratsidi
  • Izoniazid
  • Izoniazidas
  • Izoniazyd
  • Izonikotinilhidrazin
  • Pyridine-4-carbohydrazide


    Most known trade names (brands and generics) worldwide:

  • Cemidon - Chiesi
  • Hidrazida - Zimaia Laboratorio
  • Hydra - Otsuka Pharmaceutical
  • INH - Agepha, Novartis, Sandoz
  • Iscotin - Daiichi Sankyo
  • Isokin - Pfizer
  • Isonex - Pfizer
  • Isoniazid - Barr Laboratories, Cadila Pharmaceuticals, Eon Labs, Lannett, Sandoz, Teva
  • Isoniazida - Bestpharma Laboratorio, Labesfal
  • Isoniazide - Apotex, Pharmachemie, Teva
  • Isonicotinic Acid Hydrazide - Hankook Korus Pharm
  • Isozid - Fatol Arzneimittel, Institute of Pharmaceutical Research and Technology, Kemofarmacija, Riemser Pharma
  • Laniazid - Lannett
  • Nicizina - Pfizer, Lafedar Laboratorios
  • Nicotibine - BePharBel, Econophar
  • Nicozid - Vecchi & C. Piam di G. Assereto, E. Maragliano, Institute of Pharmaceutical Research and Technology, Majorelle Laboratoires, Piam Farmaceutici
  • Nydrazid - Bristol-Myers Squibb, Apothecon, Sandoz, Zentiva
  • Rimifon - Neitum Laboratoires, Roche
  • Solonex - Macleods Pharmaceuticals
  • Tibinide - Meda, Ferrosan, Pfizer, Recipharm
  • Valifol - Valdecasas Laboratorios


    Other medicines used in combinations with isoniazid:

  • Acetaminophen
  • Amino Acids
  • Aminosalicylate Sodium
  • Dapsone
  • Ethambutol
  • Lomefloxacin
  • Levofloxacin
  • Protionamide
  • Pyrazinamide
  • Rifampicin
  • Rimactane
  • Streptomycin
  • Sulfamethoxazole
  • Thioacetazone
  • Trimethoprim
  • Vitamin B6 (Pyridoxine Hydrochloride)
  • Vitamin B12 (Cyanocobalamin)
  • Vitamin C (Ascorbic Acid)
  • Vitamin D2 (Ergocalciferol)


    References and external sources:

  • Isoniazid main article on Wikipedia: https://en.wikipedia.org/wiki/Isoniazid
  • Isoniazid compound on PubChem: https://pubchem.ncbi.nlm.nih.gov/compound/Isoniazid
  • Isoniazid medicine on DrugBank: https://go.drugbank.com/drugs/DB00951
  • Isoniazid FAQ on MedlinePlus (revised 12/15/2016): https://medlineplus.gov/druginfo/meds/a682401.html
  • Pulmonary tuberculosis information on MedlinePlus (revised 11/10/2024): https://medlineplus.gov/ency/article/000077.htm
  • Chartwell Rx Isoniazid tablets drug label on DailyMed (revised February 12, 2025): https://dailymed.nlm.nih.gov/dailymed/drugInfo...
  • Genus Lifesciences Isoniazid tablets drug label on DailyMed (revised March 25, 2025): https://dailymed.nlm.nih.gov/dailymed/drugInfo...
  • Sandoz Isoniazid tablets 100 mg, 300 mg official prescribing information from the U.S. FDA (revised July 2016): https://www.accessdata.fda.gov/drugsatfda_docs/label...
  • PMS-Isoniazid tablets and oral solution product monograph from The Drug and Health Product Register (revised April 12, 2021): https://pdf.hres.ca/dpd_pm/00060491.PDF
  • Arrow Pharma Isoniazid tablets consumer medicine information from NPS MedicineWise (revised January 2023): https://www.nps.org.au/assets/medicines/...
  • Morningside Healthcare Isoniazid 100 mg tablets package information leaflet for users from Medicines.org.uk (revised January 2019): https://www.medicines.org.uk/emc/files/pil.14798.pdf

    Revised: April 2025



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